Electric alarm.



No. 677,829. Patented my 2, lam. M. wEscHr-:n & P. wnLLENHAuPT.

` ELECTRIC ALARM. (Application filedl Dec. 21, 1899.)

2 Sheets-Sheet l.

(No Model.)

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`N0. 677,829. V Patented luly 2,' |90I.

M.WESGHER & P. WLLENHAUPT.' ELECTRIC. ALARM;

(Application led Dac. 21, 1899.) (No Model.) 2 Sheets-Sheet 2.

Uni-TED STATES MAXwEscr-ma AND PAUL woLLENi-IAUPT, or COLOGNE, GERMANY,AssIcNoRs To WALTER RUBEL, oFDUIsBURG, GERMANY.

ELECTRIC ALARM'.

SPECIFICATION forming part of Letters Patent No. 677,829, dated July 2,1901. Apprenti@ tied December 21, 1899.1 sentire. 741,140. (No meier.)

logne, inthe Province of the Rhine, KingdomA of Prussia, German Empire,have invented a newaud useful Improvement in Electric Alarms, of whichthe following is specifica-- tion.

Our invention relates to an electric" alarm system by means of whichalarm-signals can be'given in different rooms at different timesdestined a long time before. Te attain this by the system illustrated inthe accompanying drawings, in which- Figure 1 is a view of the wholesystem and a diagrammatic view of the circuits. Eig. 2 is a back view ofthe clock effecting the closing of an electric circuit. Fig. 3 is anupper view of the parts shown in Fig. 2. Fig. et is a view of aperiodically-advancing toothed bar and of the armature releasing thisbar. Fig. 5 is an upperA view of the parts shown in Fig. 4. Fig. 6 is anupperview of a circuitcloser provided in each room. Fig. 7 is a frontview of the same.v j

In the drawings the system isrepresented for a plan of four rooms, inwhich every quarter of. an hour alarm-signals can be given.

On the back side of a clock a, Fig. 1, a wheel b, Fig. 2, provided withfour teeth, is Xed to the axle of the minute-hand of a double-handedclock. The teeth of this wheel b are adapted to raise the contact-leverc. In raising this contact-lever it is at first pressed against the twospiral springs d and e. These springs are connected with the poles of abattory f, Fig. 1, so that by pressing the contactlever c against thesesprings d and e the circuit of the battery f is closed. If now thecontact-lever c is further raised, it touches the screw g, Figs. 2 and8, which is connected with one pole of a second'electric battery h, Fig.l, the other pole of which is connected with the axle t', Figs. 2 and 3,around which the contact-lever c turns. In the circuit of the battery f,Fig. 1, an electric magnet-Z is provided which can effect a pivotedarmature m. This armature is situated above a toothed bar n, which ismoved by means of the weight o. The armature m is provided with a noseon each end which iitsiuto the teeth of the 'toothed bar n in the way ofthe escapement of a clock. By the up-and-down motion of the armaturem,effected by closing and breaking the circuit of the bat-teryfand bythe effect'of a spiral spring the toothed bar fn will advance one toothin the direction in `which it `is drawn by the weight 0. In the toothedlbar n wires y are ixed, so that the ends of these wires project on theback side ofthe same. When the toothed bar fn advances, the projectingends ot these wires y slide over a yplate or spring p, fixed behind thetoothed barn. Hereby itis attained that vthe project-ing ends of thewires successively come in contact with the plate or spring 2J. Now asthe magnet is energized every quarter ofan hour the toothed barn willadvance one tooth at this time, and therefore every quarter of an hourthe end of another wire will come in contact with the plate or spring p.The wires y are fixed with their free ends to pins q, screwed into theboard z, upon which the whole apparatus is mounted. These pins q areeach provided with the nomination of the time at which the projectingend of the wire aflixed to this pin cornes in contact with the spring orplate p.

In case repeated alarm -signals shall be given-that is to say, in case aquarter of an hour after the first alarm-signal a second signal shall begiventhe plate or spring lo is arranged in that way that it touches twoprojecting ends of the wires y at the same time. In this case aninterrupter must be provided in each room, in order to be able to breakthe circuit in case the second signal is not necessary. As it wouldbevery troublesome to close the circuit by hand after it has beeninterrupted, an automatic circuit-closer fr, Fig. 1, is provided. Thiscircuit-closer consists of an angle-lever s, Figs. 6 and 7, the one armof which is usually in contact with the contact-plate 15. As soon asthis arm is drawn away from the contact-plate the current isinterrupted, so that the bell will not ring any more. In order to beable to restore the current automatically, the angle-lever s is situatedin that Way that as soon as the door u of the room in which the bell isarranged is opened the angle-lever s returns to tact.

its former position, thereby restoring the con- In order to prevent thelever 's returning to the position in which the contact is broken assoon as the door is closed again, the lever is provided with a hinge w,held in its position by a spring t'. As may be seen from thedrawings,'this hinge is only turnable in= one direction, sok that whenthe door is closed only this hinge-piece turns, whilethe lever s restsin its position. f

every time in cach of the rooms, the Wires which leadvthecurrent of thebattery h back are fixed to the board e' and provided with, the numberof the room from whichtheyf come. The free ends of these Wires areprovided with a metallic ring, which can be putover each of thepins q.

The operation of, my device is vas follows:l If, for instance, thesystem is employed for av hotel and the guest living in the room No. 3jlWishes to be waked up at .3.15 oclock, he puts'/ at anytime before theringv ofv thewire pro-` vided With his room-number over the-pin marked3.15. The projecting yend ofthe:y wire fixed with its other end tothispin'co-mes, as shown above, at 3.15 oclock in contact" with the plate orspringp. A short time afterward when the contact-lever c is fartherraised by the rotation of .the Wheel b, so thatl thelever touches thescrew g, the circuitofr` the battery his closed, so that the currentycomingfrom the battery goes through the screw g, the contact-lever c,the axle z', the' bell 3, the Wire connecting'this bell Withthe lboardz, the pin marked 3.15, the Wire con-` necting this pin with the toothedbar n, the:

plate or spring j), which is just in contact with the projecting end ofthis Wire, and returns to the'battery h, ringing the bell No. 3.

The duration of each alarm-signal depends lupon the length of the teethof the Wheel 5,1

Fig. V2,. and can be prolongated or diminished by replacing the wheel Z9by another one with.'

longer or shorter teeth.

lon the next morning.

Assoon as the guest wishes to stop the terrupterr. Now it would benecessary after- Wards to close the circuit again in order to be'able togive alarm-,sign als in the same room In order to avoid that, thismust'be done by hand. The institution described above isprovided so thatthe contact is restored as` soon as the door of this room 3 isopened-that is to say, as soon as In order to be able to givealarm-signals the guest leaves 'this room. p

Whatwe claim as our invention, and desire .to secure by Letters` Patentof the United yStates of America, is-h t lever, situated above thetoothed wheel, an electromagnet l, an armature m, av toothedlbar fn.,-aweight o't'or m-ovingthis bar, electric wiresy, Iivxed'lto the toothedbar-a contactpost-p', pins q, provided Withtime-marksand metallic ringsfixed .tol the 'wires-coming from 'the differcutrooins, as and forthepurpose set forth. l v

2. Inaan electricalarmthe combination of a clock, a toothed wheel `tixedvupon'the axle Aof the minute-hand of :this clock, a contactlever,situated above the toothed .wheel, .an electromagnet VZ, an armature rn,a toothed bar n, aweight o for moving this bar, electric wiresti/,vfixed vto the toothed bar, a contactpost p, pins g,.provided withtime-marks, metallic rings -fixed tothe Wires coming from the dierentrooms, and aninterrupterconsisting of an angle-leverand a contact-plate.l

In testimonywhereof We have signed our names tothis specification inthe'presence of two subscribing witnesses.

MAX WESCHER. l PAUL 'WOLLENHAUPT. Witnesses:

THEoDoR HECsE, IsIDoR .'JUNeBLUTH.

